, Volume 4, Issue 6, pp 52–55 | Cite as

The Exhaust System of the BMW 325i SULEV / PZEV

  • Rainer Diez
  • Nils Rippert
  • Jürgen Wiehl
Research and Development


The US version of the BMW 325i is the first BMW to meet the world’s strictest emissions limit, the SULEV (Super Ultra Low Emission Vehicle) standard. A central feature of the exhaust system, which was developed by Boysen as a full system partner of BMW, is the use of ultrathinwall substrates from NGK.


Catalytic Converter Exhaust System Minimal Wall Thickness Predecessor Model Rear Silencer 
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    Wiehl, J.; Vogt, C.D.; Abe, F.; Makino, M.: Keramische Ultradünnwandsubstrate: Technologien für zukünftige Emissionskonzepte. Symposium “Entwicklungstendenzen bei Ottomotoren 2002", Ostfildern, 5.–6. 12. 2002, S. 139ff.Google Scholar

Copyright information

© Springer Fachmedien Wiesbaden GmbH 2004

Authors and Affiliations

  • Rainer Diez
    • 1
  • Nils Rippert
    • 1
  • Jürgen Wiehl
    • 2
  1. 1.Friedrich Boysen GmbH & Co. KGGermany
  2. 2.NGK Europe GmbHGermany

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